Table 2: Sensitivities of [Na/Fe] abundances to demonstrative errors in the atmospheric parameters.
Element $\Delta T_{\rm eff}$ $\Delta \log g$ $\Delta$[A/H] $\Delta v_t$
  +100 K +0.3 dex 0.2 dex +0.2 km  s-1
star 51871: $T_{\rm eff} = 3970$ K, $\log~ g=0.62$
[Na/Fe] +0.205 -0.105 +0.011 -0.008
star 39060: $T_{\rm eff} = 4357$ K, $\log~ g=1.28$
[Na/Fe] +0.172 -0.132 +0.028 -0.016
star 56136: $T_{\rm eff} = 4905$ K, $\log~ g=2.38$
[Na/Fe] +0.292 -0.156 +0.041 -0.017


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